Lignin preparation and a method for its manufacture

Details Lignin preparation and a method for its manufacture Lignin preparation and a method for its manufacture

C - Chemistry, Metallurgy

08

H

260/133, 44/4

C08H 7/00 (2011.01) C10L 5/44 (2006.01) C10L 9/00 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2005146

The invention relates to a lignin preparation prepared from black liquor derived from an alkali delignification process, such as the sulphate process, soda process or polysulphide process. The lignin preparation comprises mainly lignin and at least the major part of the sodium content of the lignin separated from the black liquor deriving from such processes has been replaced with calcium, therewith to provide a lignin preparation having improved properties which render the preparation more suitable for use as fuel.

L'invention porte sur une préparation de lignine, obtenue à partir de la liqueur noire des procédés de délignification par les alcalis, comme les procédés au sulfate, à la soude ou au polysulfure. La préparation de lignine renferme principalement de la lignine, et au moins la majeure partie du sodium de la lignine séparée de la liqueur noire de ces procédés, a été remplacée par du calcium, de façon à obtenir une préparation de lignine aux propriétés supérieures, rendant plus facile son emploi comme combustible.

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